Difficulty selecting axis?
Thanks for your answer but through a bit more trial and error I figured it out. My Clipping Distance "END" was set to something stupid like 1000000m. Lowering it down to 10000m solved the problem.

I used a fresh startup file and things worked as they should so I compared the setting of the startup file to my own and found the discrepancy.

When the value was up that high, it had trouble highlighting the desired axis. I don't know if that's a bug or if that's how it's intended.